Shiny not displaying my ggplot as I'd expect

Question

What\'s keeping my little Shiny app from displaying my ggplot? When I replace the code in renderPlot() with an example using the base plot function it comes together. I\'m

Answer 1

In ggplot2 you can subset the overall data being passed to all layers (@GSee's answer) or, for indivdual layers you can use the subset argument to subset just for that layer. This may be useful if you are constructing more complex plots.

Using the plyr function . is useful here for constructing the arguments

# required in server.R (along with the other calls to library)
library(plyr)

 p <- ggplot(finalDat, aes(y =Year, x = Value)) + 
        geom_point(subset = .(City ==input$city))
 print(p)